Clock won't stay set ('99 LS400 w/ nav)
 

I have a '99 LS400 and my clock constantly reverts back to Pacific time every time the car is shut off. Each time, I set my clock manually back and even set the time zone back to central, but it never remembers. Any tricks I don't know? Hopefully I can have my double-din installed soon so this won't be a problem.

Maybe it needs a nav update even though the latest update is most likely outdated.

I gotcha, it is currently running the '03 software. I already have the non-nav climate control so I guess I just need to order the rest of the pieces for my double-din and have that installed and not worry with this outdated stuff.

On another note, my memory seats usually only remember their positions while the car is on, but forget if I shut the car off. I'm guessing that's probably the module in the door?

Losing voltage?
 

Your two problems may be caused by the loss of "keep alive" voltage to those modules when you turn off the ignition. Have you been messing with any wiring lately?

I've only had the car a week and haven't messed with anything. I know for a fact the battery was replaced the day before I bought the car, but I'm not sure if the PO has done anything with the wiring.